[1][2] He was one of Japan's most influential theater figures, to the extent that recent Japanese theatrical history has been divided into pre-Tsuka and post-Tsuka periods.
[2] Tsuka was a second-generation Korean-Japanese whose experience as a member of a minority informed his work.
"[4] Tsuka started his theater career with "A Red Beret for You" as a student at Keio University.
[5] He focused less on text, often improvising based on the written play, and used the everyday language of the youth.
[5] His system, called jikogekika, compels actors to put themselves and their ideas on stage, with little concern for society as a whole.